First of all, I want to say that learning math well in junior high school has little effect on math in senior high school! Don't always talk about junior high school grades. I am better at math in junior high school than you. At the beginning of high school, I just passed the math exam. I also learned the people's education edition, and the textbook is very shallow! Learning methods mainly rely on teachers to teach and read reference books. Sets and functions are actually not difficult. It's just that you don't really understand the definition, the method of doing the problem and so on! What the textbook says is too simple! Understand the definition! Many methods are customized! Most people listen attentively in class and do two exercises after class. I won't do it if I meet someone who can't. Know how to do basic training a little better. This kind of person should not! That would be weird. Come on! If you pass the teacher's high level, you can get about 70 points. Otherwise it will be worse! Many people's mathematics is finished here! Especially in junior high school. All right! I'm almost finished, too.

Actually, I was depressed in high school! Originally, junior high school mathematics was a top student. After high school, I got about 60-70 points in several exams. I feel that I am working hard, but I have not made much progress! Later, after a month's hard work, I finally took the first place in mathematics in our class! That's fucking cool! Of course, they will be miserable in the future and will never do this position again! They have no chance! Let me tell you how hard I work! At that time, I read the wrong questions on the test paper over and over again. One of them is to judge parity! How am I wrong? In fact, I didn't even know the definition at that time. All I know is to copy the pattern according to the examples in the textbook (what the textbook says is actually very general, mainly depending on what the teacher says). Later, I learned that judging parity is first of all a domain. So I think what I lack is the idea of doing the problem. So I bought two reference books (full textbooks and detailed textbooks). I just read the example above, and when I understand it, I will do the exercises. Even if you don't understand, ask the teacher. If I don't understand anything, I'll copy it against the answer. I remember I used up all the herbal medicines in one week! I asked more questions than the whole class at that time! Very bitter! In fact, high school mathematics is not easy to learn there, so I wish I could come here!

I want to buy reference books. Look at the example above. Learn how to solve problems from above. Is for you to imitate. Do more exercises. The method is basically mastered. Still need to look at more examples.

Do 20 math problems every day from the first year of high school, and the college entrance examination 130 or above! I practiced this myself!